Guide device for taps or reamers



Apr. 24, 1923. f

A. W. STOKES GUIDE DEVICE FOR TAPS OR REAMERS Filed Nov. 8, 1921 lll in un 'ipa i illt i llil l .application tiled November To ZZ fui/"wm t fma/ concern:

le 1t knovvn that l, itineraire lili. tl'ronns, a

`citizen of the United tltates, residing` at Philadelphia, in the county oit fthiladelphia and Ldtate oi Pennsylvania, have invented certain nevi/and useful ..llrnprove1nen'ts in t-.luide Devices tor Taps or lleamers, ot 'which the ollovvirne,- is aI speciiication.

lldyinvention relates to improvements in g'liiide devices tor screw-thread cutting` taps,

or reainers. i

lin important object ol. the invention is to provide a device ot the above mentioned character, which Will retain the tap or reamer in a proper position with `relation to the i opening, and which is adapted to receive mit lili

andhold cutters oit ditlerent `sizes, and sell-ad]ustinp,n with respect to hold ing; such cutters.

t iturther object ot the` invention is to provide a device ot the above mentioned character, vvhich will permit ot' the passage ot the turnings or loorings throughtheopeninn'. and vvhichis adapted to permit of the use ot thcdevice close to a wall, at right` angles thereto.

j t iturther object ot the invention is t-o provide a device ot the above mentioned character, which is simple in construction, cheap to manufacture, strong,` and durable.

Utherfobjects and advantages of the invention will be apparent duringithe course ot the following description. y p ln the accornpanyinn` draavrngs forming a part of this speciiication and in which like numerals i are employed to designate like parts throughout the saine. `l is a side elevation ot the guide device embodying mv inventiomthe turningl element being,1 removed,

tig; 2 isa Central horizontal section ot the saine,` y v 3 is a horizontal section taken on line 3-3 ot llig. l,

` lling. d is a similar vievv talrenonline iml i ott Fig. l, i

lllig is `a central horizontal. sectional vievv through a slightly diiderent :torrn ot a tan holdino element,

6 is a transverse section taken on line 6--6 ot lllig. 5,

llig. t' is a side elevation ot the device shovvn in ltlig. l vvith the turning; element applied, and,

i3 is an end elevation ot the base.

ln the drawings, wherein ior the purpose d, will..

oli illustration is shown a preferred elnbodiiuent ot my invention, the numeral l() designates the body portion ot the guide device, ivliiehbody portion is held at a right angle to the loneitudinal airis ot the opening; rllhis body portion, llig. fl, is provided upon its iliorvvard tace `with a longitudinal recess or groove ll, which is lil-shaped in cross section or tapered, as shovvn. The body portion l() is rigidly mounted upon a base or 'foot l2, arranged at a right angle to the body portion. rlhe torivard end ot' the base is tapered or cut away at 13. 'llhe ton Ward end ot the base terminates tlush with the torivard tace oi the body portion l0, that the forward end ot the base may be brought in close relation to the opening but will not cover the opening, the recess il enn tending through the forward end olf the base l2. 'lhis permits oi the tree passage ot the boring's, and also the employment ot the device in close vvorlr. lhe base `l2 extends rearivardly beyond the body portion l0 tor a substantial distance and may be conveniently held in place by the lingers.

y rllhe base l2 is provided in its lower face with a "tl-shaped groove l2, `which receives a portion ot the round Work, it the opening; tornied in a rod or the like. The body portion lll is provided near i upper end with a transverse openinglet, lidably receiving' a holding? element or bei' provided inits top with a longitudinal 1groove lo, receiving); the inner end oli a seii'evv li', this screuT serving to limit the lougri Ludinal movement; oit the hold element l5 and also prevents the same ,rom turningv upon its longitudinal axis. it comi'iressible coil sprinnt ld surrounds the rear end portion ot the holding element l5, and is con'ned betvveen the body portion and a pin i9 extend inn; 'transversely through the element 15, as shown.`

rlFhe holding; element l5 is provided in its iliorrvard portion vvith a circular opening; Q0, h avinp," laroror diameter than the maximum diameter oit the tap in connection with. which the device is to be used.

'lfhe numeral designates a tap, having; 'thread cutting elements 22, and provided at its top with a square portion 23 engaging Within the socket @el oi. a turning element 25, having a transverse handle 26.

lt contemplate using` a holding element et slightly diderent construction, and in lig. 5 the ltioldingi1 element 15P corresponds to the tilt? lOlS llll

holding element and is provided with an opening 27, having a tapered forward portion 28. The opening 27 leads into a bore 29, slidably receiving a plunger 30, having a tapered or V-shaped recess 31, arranged opposite the recess 28. The plunger 30 carries a stem 32 rigidly secured thereto, and this stem may slide within an opening 33, formed in a plug 34, screw-threaded into the bore 29 at 35 and held against turning movement by the pin 19, engaged by the spring i8. A. compressible coil spring 87 surrounds the stem 32 and moves the plunger 30 ford wardly. It is thus seen that the holding element 15 is movable with relation to the body portion 10, and the plunger 30 is movable with relation to the holding element, whereby the holding element may be used in connection with taps having a large range of sizes, which taps will be held against displacement, upon being inserted between the recesses 28 and In the use of the device, the holding element 15 may be forced forwardly, and the tap 21 inserted between the opening 20. The holding element is then released and the spring 18 will move the element 15 rearwardly, which in turning will bind the tap against the wall of the recess 11. The base 12 is held in engagement with the work having an opening therein and the device is advanced so that the forward end of the tap may be entered in the opening, the tap being held by the device, perpendicular to the sur" tace of the work. The tap is turned by the turning element, as is obvious.

It is to be understood that the forms of my invention herewith shown and described is to be taken as a preferred example of the xsame, and that various changes in the shape, size and arrangement of parts may be resorted to without departing from the spirit or' my invention or the scope oi" the sub- `ioined claims.

Having thus described my invention, I claim:

l. A guide device for screw-thread cutting taps, reamers or the like, comprising a body portion having one end thereof adapted to Contact with the work having an opening therein, said body portion being provided upon one side with a groove, a holding element slidably engaging the body portion and adapted to move transversely of the groove, said holding element having means to slidably receive and hold a tap or the l and yielding means to move said hold element in one direction.

2. A guide device for screw-thread cutting taps. reuincrs or the like. comprising a body portion having a base, said body portion bcing provided upon its forward side with a groove which is tapered in cross section, said Jody portion also having a transverse opening, a holding element slidable within the transverse opening and having means to slidably receive the tap or the like, and a spring surrounding a portion ot the holding elcment and serving to move it in one direction.

3. A guide device tor screw-thread cutting taps, reamers or the like, comprising a body portion having a base, said body portion being provided upon its iorward side with a groove which is tapered in cross section, said body portion also having a transverse opening.y a iolding element slidable within the transverse opening and having an opening therein to receive a tap or the like, and move the tap into said groove, and a spring surrounding a portion of the holding element and serving to move it in one direction.

1. "-l guide device tor s .i'e\-,-tbrcad cutting taps, reamers or the like, comprising a body portion having a basev` said body portingr being provided with a longitudinal groove and a transverse opening, a holding element slidablc within the transverse opening and provided with an opening having a tapered portion, a plunger slidably mounted upon the holding element and having a tapered recess arranged opposite the tapered portion ot the opening ol the holding element, a spring to move the plunger forwardly, and a spring to move the holding clement rearwardly.

A guide device t'or screw-thread cutting taps, reainers or the like, comprising a body portion and a base secured to the body portion, said base being provided upon its lower face with a longitudinal opening which is substantially inverted V-shaped in cross scc-- tion. said body portion having an opening therein and provided upon one side with a groove. a holding element slidably mounted within sa id opening to move tansversely of the groove, said holding element having means to slidably receive and hold a tap or the like. and yielding means to move said holding element in one direction.

ln testimony whereof I aiix my signature.

A LBERT W. STORES.

like. 

